Hi all,<br><br>I&#39;m doing a simple image convolution.<br><br>At this point, I&#39;m just sending different rows of the image to the clients (rank&gt;0) from the server (rank=0), having the client do the convolution for that row and send back the resulting image to the server.....[Once I understand whats going on....its trivial to send all the rows to all the diff clients and then go down and do a receive from all of them]
<br><br>I&#39;m able to send to the clients and receive from them once only.<br><br>After this (from the output of -sa), the clients exit cleanly (kill = 0 and status=0) [but they aren&#39;t supposed to]<br><br>So, the server cant send/receive from them anymore
<br><br>And so the server (rank 0) ends up with kill=1 (bad exit) and signal=13(permission denied ...probably because its trying to send to processes that have exited).<br><br>I&#39;m running&nbsp; LAM 7.1.2/MPI 2 on Fedora core 5
<br><br>And its C code not Fortran<br><br>All insights are welcome.<br><br>--Elf<br clear="all"><br>-- <br>&quot;For those who understand, no explanation is needed; for those who do not, none will do.&quot;<br>